hygroscope

[hahy-gruh-skohp]

hy·gro·scope

[hahy-gruh-skohp]
noun
an instrument that indicates the approximate humidity of the air.

Origin:
1655–65; hygro- + -scope
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Hygroscope is always a great word to know.
So is ort. Does it mean:
a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.
a scrap or morsel of food left at a meal.
Collins
World English Dictionary
hygroscope (ˈhaɪɡrəˌskəʊp)
 
n
any device that indicates the humidity of the air without necessarily measuring it

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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American Heritage
Science Dictionary
hygroscope   (hī'grə-skōp')  Pronunciation Key 
An instrument that records changes in atmospheric humidity. Unlike a hygrometer, a hygroscope only indicates a change in relative humidity, without measuring the magnitude of the change.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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